最近天气有点冷,吹牛逼之前,先热个身O(∩_∩)O哈哈~,
整理了之前写的方法,重新修改了文件下载demo,新demo从服务器下载文件地址(以图片和pdf文件为例):稍后附上
https://download.csdn.net/download/qq_35702985/11688476
如果调用okhttp工具类下载服务器文件报错
请按以下步骤检查:
1.动态申请权限,同时AndroidManifest.xml的application中添加
android:usesCleartextTraffic="true"
2.下载文件函数(downFile)在线程中调用
3.downFile的第二个参数文件路径写成相对路径(Environment.getExternalStorageDirectory() + "/download/")
相关代码:
public void checkPemission() {
Log.e("TAG", "进入了checkPemission()");
int hasWritePermission = PermissionChecker.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (hasWritePermission != PermissionChecker.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 9);
} else {
new Thread() {
@Override
public void run() {
super.run();
downFile(urlString);
}
}.start();
}
}
/**
* 文件下载
*/
private void downFile(String url) {
DownloadUtil.get().download(url, Environment.getExternalStorageDirectory() + "/pdf/", "test.pdf",
new DownloadUtil.OnDownloadListener() {
@Override
public void onDownloadSuccess(File file) {
openPDF(file);//打开PDF文件
}
@Override
public void onDownloading(int progress) {
}
@Override
public void onDownloadFailed(Exception e) {
//下载异常进行相关提示操作
}
});
}
源码地址: 稍后附上 https://download.csdn.net/download/qq_35702985/11643721